The story is a retelling of Tekken 3, and I enjoyed this show as a short afternoon binge because I played a bit of Tekken as a kid but never really knew much about the story. But I don't recommend this show if you have no interest in Tekken and just want a martial arts tournament like God of Highschool, Kengan Ashura and Megalo Box.
The fights are decent, but short and simple. The short 6 episode length also makes it impossible to get invested in most of the characters. Despite half of this show being a martial arts tournament, I don't recommend watching this for the fights alone. Most fights are off-screen anyway.
The art and animation are fine. The CGI was not an issue, most of the time I could not tell if a frame was 2D or 3D.
The music has to be one of the most forgettable soundtracks I've ever heard in anime.